84 Lock Screen and SecuritySettingsUnknown SourcesEnable installation of non-Google Play applications.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security >Unknown sources to enable this option.Warning: Enabling installation of third-partyapplications can cause your device and personal datato be more vulnerable to attacks by unknown sources.Protect Encrypted DataRequire a numeric PIN or password to decrypt yourdevice each time you power it on.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security > Encrypt deviceand follow the prompts to encrypt all data onyour device.Encrypt SD CardRequire a numeric PIN or password to decrypt yourSD card (not included) when you first access it afterpowering on your device.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security > EncryptSD card.3. Tap Encrypt SD card and follow the prompts toencrypt all data on your memory card.Other Security SettingsSet Up/Change PasswordProtect your device from being reset accidentally byrequiring a special password before it can be resetto its factory defaults.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security > Other securitysettings.3. Tap Set up/change password and follow theprompts.SIM Card LockRequire both your SIM card PIN and your ordinaryscreen lock type when unlocking the device.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security > Other securitysettings > Set up SIM card lock and follow theprompts.3. Tap Lock SIM card to enable the feature.4. Tap Change SIM card PIN to create a new PIN.View PasswordsDisplay password characters briefly as you typethem.1. From a Home screen, tap Apps >Settings.2. Tap Lock screen and security > Other securitysettings > Make passwords visible to turn thefeature on.